London-based technology charity techfortrade has announced the finalists for the inaugural 3D4D Challenge, which aims to find the best ideas for using 3D printing to help deliver social benefits in the developing world.

The challenge receive entries from around the world, and judges have now selected the seven finalists.

• solar lamps created from used plastic Coke bottles using 3D printed ‘bottle caps’ and attachments for the charger, battery and PCB components.

• specially designed 3D printed shoes produced from recycled plastic to be worn by individuals suffering from foot deformities due to the growing problem of jigger fly infestation – in order to prevent further deterioration

Each of the finalists will receive $1000 and access to expert mentors in order to develop their projects in the run up to the competition final, which will take place at this year’s 3D Printshow on 19 October.

Techfortrade will award the winner a prize of $100,000 to enable the winning concept to be implemented.

William Hoyle, CEO of techfortrade, said: “The standard of entries for the 3D4D Challenge has been exceptional, especially as this is the first time we’ve done this. The judging process was tough and we are certain the finalists will help to inspire future innovation.”